"Split" Menu of QtCreator appears always on left monitor regardless where the creator window is located

I'm working with three monitors on Linux.

When I open the "Split" menu of my QtCreator, the one which appears when I click on the button shown in SplitButton.png, then the menu opens always on the left monitor regardless where the QtCreator window is located. See screenshots.

On the screenshots you also see the nvidia-settings window which shows the monitor setup.